Need to restrict the lines per page with 2 group levels in RTF report

Hi,

I have a requrirement to build a AR invoice template with follwing requirements.

1. The template should show the invoices by grouping at the sip to location

2. The invoices has to be displayed based on the above grouped ship to location

3. Sub total has to be displayed under each ship to location section

4. No of lines per page has to be restricted and filler logic should be included to fill the remaining space at the last page of an invoice.After the filler logic Total amount of the invoice,the signature and a note section has to be dispalyed next below the filler section at the last page.